/*
* JBoss, Home of Professional Open Source
* Copyright 2009, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.hibernate.validator.internal.util;

import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class MyReflectionUtils{


    /**
     * 循环向上转型, 获取对象的 DeclaredField
     * @param object : 子类对象
     * @return 父类中的属性对象
     */

    public static Set<Field> getDeclaredFields(Object object){
        Set<Field> fileds = new HashSet<Field>();
        //Field field = null ;

        Class<?> clazz = object.getClass() ;

        while(clazz.getSuperclass() != Object.class) {
            fileds.addAll(Arrays.asList(clazz.getDeclaredFields()));
            clazz = clazz.getSuperclass();
        }

        return fileds;
    }

    /**
     * 循环向上转型, 获取对象的 DeclaredField
     * @param object : 子类对象
     * @return 父类中的属性对象
     */

    public static Field getDeclaredField(Object object, String fieldName){
        Field result = null ;

        Class<?> clazz = object.getClass() ;

        while(clazz.getSuperclass() != null) {
            try {
                result = clazz.getDeclaredField(fieldName);
                break;
            }
            catch (NoSuchFieldException e) {
            }
            clazz = clazz.getSuperclass();
        }

        return result;
    }
}
